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Change the way FreeBSD GID inheritance is hacked.

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I believe previous ifdef caused NULL dereference in later zfs_log_create()
on attempt to create file inside directory belonging to ephemeral group
created on illumos, trying to write to log information about GID domain
of the newly created file, inheriting the ephemeral GID.

This patch reuses original illumos SGID code with exception that due to
lack of ID mapping code on FreeBSD ephemeral GID will turn into GID_NOBODY
by another ifdef inside zfs_fuid_map_id().

MFC after:	1 month
Sponsored by:	iXsystems, Inc.
This commit is contained in:
Alexander Motin 2019-04-19 15:44:45 +00:00
parent 96ca24dc32
commit 48ecceba1e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=346390
1 changed files with 4 additions and 4 deletions
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8
sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_acl.c
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@ -1655,7 +1655,9 @@ zfs_acl_ids_create(znode_t *dzp, int flag, vattr_t *vap, cred_t *cr,
acl_ids->z_fgid = 0;
}
if (acl_ids->z_fgid == 0) {
#ifndef __FreeBSD_kernel__
if (dzp->z_mode & S_ISGID) {
#endif
char *domain;
uint32_t rid;
@ -1674,15 +1676,13 @@ zfs_acl_ids_create(znode_t *dzp, int flag, vattr_t *vap, cred_t *cr,
FUID_INDEX(acl_ids->z_fgid),
acl_ids->z_fgid, ZFS_GROUP);
}
#ifndef __FreeBSD_kernel__
} else {
acl_ids->z_fgid = zfs_fuid_create_cred(zfsvfs,
ZFS_GROUP, cr, &acl_ids->z_fuidp);
#ifdef __FreeBSD_kernel__
gid = acl_ids->z_fgid = dzp->z_gid;
#else
gid = crgetgid(cr);
#endif
}
#endif
}
}